social networking:

• tumblr
• listography
• polyvore
• facebook
• goodreads

music:

• songza
• spotify
• last.fm

fashion/retailing

• forever21
• modcloth
• ruche
• romwe
• topshop
• freepeople
• wildfox couture

other retailing

• perpetual kid
• out of print
• amazon
• etsy